351120

Appears in sequences

• Denominator in Feinler's formula for unsigned Bernoulli number |B_{2n}|.at n=27A002444
• One sixth of octo-factorial numbers.at n=4A034912
• a(n) = lcm(6n+2, 6n+4, 6n+6).at n=18A061506
• Sum of divisors of 2^n+1.at n=17A069061
• Expansion of q^(-1) * (chi(-q) * chi(-q^9) / chi(-q^3)^2)^6 in powers of q where chi() is a Ramanujan theta function.at n=29A128512
• Numbers with prime factorization pqrstu^4.at n=2A190388
• Numbers n such that the multiplicative group modulo n is the direct product of 7 cyclic groups.at n=18A272597
• Primitive 4-abundant numbers: Numbers k such that sigma(k) > 4k (A068404) all of whose proper divisors d are 4-deficient numbers (having sigma(d) < 4d).at n=27A307114
• Number of n-colorings of the vertices of the 4-dimensional cross polytope such that no two adjacent vertices have the same color.at n=8A334281
• Triangle read by rows: T(n,k) is the number of n-colorings of the vertices of the k-dimensional cross polytope such that no two adjacent vertices have the same color. 0 <= k <= n.at n=40A342088
• a(n) is the smallest number with exactly n divisors that are n-gonal pyramidal numbers.at n=4A358540
• Sum of the divisors of 4^n+1.at n=9A366607
• Sum of the divisors of 8^n+1.at n=6A366657
• Primitive terms of A023198: numbers k with the property sigma(k)/k >= 4 that are not divisible by any other number with that property.at n=29A392936